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'14 mack cxu613 day cab, a/c is freezing up on the low side from the compressor to the evaporator 240 owners who have installed these kits report good ac performance but these kits have been discontinued for several years now. Blowing extremely cold air (single digits) until it.

The leak is from the evaporator, you can remove the evaporator/heater core assly without removing the the whole hvac unit It consisted of a bottle of ester oil, green orings for the entire system, an inline high side fitting, a low side adapter fitting, r134a txv, and a special parallel flow evaporator Clamp the heater hoses and remove them from the core, recover the refrigerant and removed the lines and exp

Mack truck evaporator removal procedure explained evaporator leaks and clogged drain lines commonly cause hvac inefficiency in mack truck cabins

To remove the evaporator, first disconnect the battery and evacuate refrigerant safely Access the evaporator by removing the dashboard or hvac housing. Either you don't have enough air flow over the evaporator , or you have heat leaking into the system (duct work) Over charging a system will reduce the effective area of the condenser, and raise the pressure causing more heat in the refrigerant that can't be shed by the reduced effective area of the condenser!

If a leak is found, continue to the service procedure below to replace the evaporator, blower/fan assembly (if necessary) and thoroughly clean the interior of the evaporator case. Looking at you post i was before considering how an undercharged system would make the compressor cycle to much Will and overcharged system make the compressor cycle to much, also will overcharged system freeze up the evaporator I was told the clutch cycles to prevent the evaporator from freezing up, i do not know if this is true.

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2001 cx613 mack is building coolant pressure did cylinder leak test ok,disconected air compressor ok,removed fan belt My dads mack dump truck seems to be leaking all of the refrigerant out of the ac system He said the ac stopped blowing cold one day, recharged the system, but the next day it was all hot air again He said he couldn't see the leak so he thought it was the evaporator and replaced that.

This is volvo part# 9134808

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